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BOSTON MARATHON 2025

Kent Duncan

Bib: 14603•M

BC

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 27%
Gender (Male)
#0 / 16105
Top 40%
Masters (Masters Men)
#0 / 10463
Top 27%
Division (M60-64)
#0 / 1259
Top 4%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:03/mi
21:54
↑ 97↓ 3451.5%
10K· 6.21 mi
7:11/mi
44:14
↑ 79↓ 1380.4%
15K· 9.32 mi
7:11/mi
1:06:32
↑ 67↓ 78
20K· 12.43 mi
7:18/mi
1:29:12
↑ 106↓ 860.1%
Half· 13.11 mi
7:12/mi
1:34:07
↑ 19↓ 370.5%
25K· 15.53 mi
7:26/mi
1:52:08
↑ 66↓ 880.2%
30K· 18.64 mi
7:46/mi
2:16:15
↑ 181↓ 1480.2%
20M
7:36/mi
2:26:35
↑ 64↓ 500.2%
21M
8:06/mi
2:34:41
↑ 106↓ 241.6%
35K· 21.75 mi
7:13/mi
2:40:05
↑ 17↓ 861.7%
23M
7:22/mi
2:49:18
↑ 23↓ 630.6%
24M
7:08/mi
2:56:26
↓ 821.3%
40K· 24.85 mi
7:22/mi
3:02:44
↓ 200.3%
25.2M
7:58/mi
3:05:29
↑ 13↓ 160.2%
Finish· 26.22 mi
7:01/mi
3:12:38
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:34:07
Pace7:11 /mi
2nd Half
Distance13.11 mi
Time1:38:31
Pace7:31 /mi
📊Positive Split: 4.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:5021:547:0321:54
7:03
-
10K
6.21 mi11:14:1044:147:0722:20
7:11
+0:08
15K
9.32 mi11:36:281:06:327:0822:18
7:11
0:00
20K
12.43 mi11:59:081:29:127:1122:40
7:18
+0:07
Half
13.11 mi12:04:031:34:077:114:55
7:12
-0:06
25K
15.53 mi12:22:041:52:087:1318:01
7:26
+0:14
30K
18.64 mi12:46:112:16:157:1924:07
7:46
+0:20
20M
20.00 mi12:56:312:26:357:2010:20
7:36
-0:10
21M
21.00 mi13:04:372:34:417:228:06
8:06
+0:30
35K
21.75 mi13:10:012:40:057:225:24
7:13
-0:53
23M
23.00 mi13:19:142:49:187:229:13
7:22
+0:09
24M
24.00 mi13:26:222:56:267:217:08
7:08
-0:14
40K
24.85 mi13:32:403:02:447:216:18
7:22
+0:14
25.2M
25.20 mi13:35:253:05:297:222:45
7:58
+0:36
Finish
26.22 mi13:42:343:12:387:217:09
7:01
-0:57

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

7:01 /mi

Average Pace

7:21 /mi

Slowest Pace

8:06 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:37:40

82% of race

Time at Steady Pace

34:58

18% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:21 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:51:5021:547:0321:54
7:03
#8199
10K
6.21 mi11:14:1044:147:0722:20
7:11
#8768
15K
9.32 mi11:36:281:06:327:0822:18
7:11
#8812
20K
12.43 mi11:59:081:29:127:1122:40
7:18
#8786
Half
13.11 mi12:04:031:34:077:114:55
7:12
#8784
25K
15.53 mi12:22:041:52:087:1318:01
7:26
#8841
30K
18.64 mi12:46:112:16:157:1924:07
7:46
#8913
20M
20.00 mi12:56:312:26:357:2010:20
7:36
#8766
21M
21.00 mi13:04:372:34:417:228:06
8:06
#8686
35K
21.75 mi13:10:012:40:057:225:24
7:13
#8567
23M
23.00 mi13:19:142:49:187:229:13
7:22
#8310
24M
24.00 mi13:26:222:56:267:217:08
7:08
#8115
40K
24.85 mi13:32:403:02:447:216:18
7:22
#7991
25.2M
25.20 mi13:35:253:05:297:222:45
7:58
#7928
Finish
26.22 mi13:42:343:12:387:217:09
7:01
#7784
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi8199712171218927(Top 31%)7504(Top 47%)7504(Top 596%)
10K6.21 mi3.10 mi8768-5697461-3407461-3409374(Top 33%)7804(Top 48%)7804(Top 620%)
15K9.32 mi3.11 mi8812-447474-137474-138927(Top 31%)7504(Top 47%)7504(Top 596%)
20K12.43 mi3.11 mi8786+267433+417433+419009(Top 32%)7452(Top 46%)7452(Top 592%)
Half13.11 mi0.68 mi8784+27424+97424+99059(Top 32%)7491(Top 47%)7491(Top 595%)
25K15.53 mi2.42 mi8841-577434-107434-109366(Top 33%)7533(Top 47%)7533(Top 598%)
30K18.64 mi3.11 mi8913-727413+217413+219616(Top 34%)7483(Top 46%)7483(Top 594%)
20M20.00 mi1.36 mi8766+1477294+1197294+1197703(Top 27%)6259(Top 39%)6259(Top 497%)
21M21.00 mi1.00 mi8686+807216+787216+787933(Top 28%)6215(Top 39%)6215(Top 494%)
35K21.75 mi0.75 mi8567+1197130+867130+866716(Top 24%)5535(Top 34%)5535(Top 440%)
23M23.00 mi1.25 mi8310+2576935+1956935+1955818(Top 20%)4866(Top 30%)4866(Top 386%)
24M24.00 mi1.00 mi8115+1956774+1616774+1615420(Top 19%)4554(Top 28%)4554(Top 362%)
40K24.85 mi0.85 mi7991+1246663+1116663+1116016(Top 21%)4862(Top 30%)4862(Top 386%)
25.2M25.20 mi0.35 mi7928+636614+496614+495802(Top 20%)4627(Top 29%)4627(Top 368%)
Finish26.22 mi1.02 mi7784+1446493+1216493+1215839(Top 21%)4636(Top 29%)4636(Top 368%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 31%
×21story building
+97ft-345ft

Overall

8927

Males

7504

M60-64

7504

5K→10K

3.1 - 6.2 mi

Top 33%
×5story building
+79ft-138ft

Overall

9374

Males

7804

M60-64

7804

10K→15K

6.2 - 9.3 mi

Top 31%
×3story building
+67ft-78ft

Overall

8927

Males

7504

M60-64

7504

15K→20K

9.3 - 12.4 mi

Top 32%
×5story building
+106ft-86ft

Overall

9009

Males

7452

M60-64

7452

20K→Half

12.4 - 13.1 mi

Top 32%
×2story building
+19ft-37ft

Overall

9059

Males

7491

M60-64

7491

Half→25K

13.1 - 15.5 mi

Top 33%
×4story building
+66ft-88ft

Overall

9366

Males

7533

M60-64

7533

25K→30K

15.5 - 18.6 mi

Top 34%
×9story building
+181ft-148ft

Overall

9616

Males

7483

M60-64

7483

30K→20M

18.6 - 20.0 mi

Top 27%
×5story building
+64ft-50ft

Overall

7703

Males

6259

M60-64

6259

20M→21M

20.0 - 21.0 mi

Top 28%
×8story building
+106ft-24ft

Overall

7933

Males

6215

M60-64

6215

21M→35K

21.0 - 21.8 mi

Top 24%
×7story building
+17ft-86ft

Overall

6716

Males

5535

M60-64

5535

35K→23M

21.8 - 23.0 mi

Top 20%
×5story building
+23ft-63ft

Overall

5818

Males

4866

M60-64

4866

23M→24M

23.0 - 24.0 mi

Top 19%
×6story building
+12ft-82ft

Overall

5420

Males

4554

M60-64

4554

24M→40K

24.0 - 24.9 mi

Top 21%
×1story
+6ft-20ft

Overall

6016

Males

4862

M60-64

4862

40K→25.2M

24.9 - 25.2 mi

Top 20%
×1story
+13ft-16ft

Overall

5802

Males

4627

M60-64

4627

25.2M→Finish

25.2 - 26.2 mi

Top 21%
×2story building
+22ft-21ft

Overall

5839

Males

4636

M60-64

4636

Passing Analysis

Category:
Athletes Passed
2001
Passed By
1586
Net Change
+415
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8199
5K → 10K50619-569#8199#8768
10K → 15K145189-44#8768#8812
15K → 20K181155+26#8812#8786
20K → Half3028+2#8786#8784
Half → 25K139196-57#8784#8841
25K → 30K195267-72#8841#8913
30K → 20M17225+147#8913#8766
20M → 21M13050+80#8766#8686
21M → 35K13011+119#8686#8567
35K → 23M2658+257#8567#8310
23M → 24M1994+195#8310#8115
24M → 40K13410+124#8115#7991
40K → 25.2M685+63#7991#7928
25.2M → Finish16319+144#7928#7784
TOTALS20011586+415
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing